Five Little Pigs

Could the answers be found in a nursery rhyme?

A twenty-first birthday is a time for celebration. A time to look forward to the future. It’s also time to discover that your father was poisoned by your mother, and that she died in prison when you were only five years old.

But did she do it? A letter claims otherwise.

Hercule poirot must go back and interview the original suspects and find out what really happened all those years ago.